Hamburg 2009 – scientific programme
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A: Fachverband Atomphysik
A 34: Poster II
A 34.52: Poster
Thursday, March 5, 2009, 16:30–19:00, VMP 9 Poster
Photoionization of the alkali dimer cations Li2+, Na2+ and LiNa+: influence of the nuclear motion — •Irina Dumitriu and Alejandro Saenz — Humboldt-Universität zu Berlin, Institut für Physik, AG Moderne Optik, Hausvogteiplatz 5-7, D-10117 Berlin, Germany.
Photoionization cross sections for the three lightest alkali dimer cations (Li2+, Na2+, and LiNa+) were calculated at the equilibrium internuclear distance for parallel, perpendicular and isotropic orientations of the molecular axis with respect to the field. A model-potential method was used for the description of the cores. The influence of the model-potential parameters on the photoionization spectra was investigated, and two different methods, a time-independent and a time-dependent one, were used for computing the cross sections. Going beyond the fixed-nuclei approximation from [1], an investigation of the probability of photoionization as a function of the internuclear distance was made and will be presented here.
[1] I. Dumitriu, Y. V. Vanne, M. Awasthi, A. Saenz, J. Phys. B: At. Mol. Phys. 40 1821 (2007).